using System;
using iTextSharp.text.error_messages;

/*
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.pdf {

    /**
     * A <CODE>PdfSpotColor</CODE> defines a ColorSpace
     *
     * @see     PdfDictionary
     */

    public class PdfSpotColor{
    
        /*  The color name */
        public PdfName name;
    
        /* The alternative color space */
        public BaseColor altcs;
        // constructors
    
        /**
         * Constructs a new <CODE>PdfSpotColor</CODE>.
         *
         * @param       name        a string value
         * @param       tint        a tint value between 0 and 1
         * @param       altcs       a altnative colorspace value
         */
    
        public PdfSpotColor(string name, BaseColor altcs) {
            this.name = new PdfName(name);
            this.altcs = altcs;
        }
    
        public BaseColor AlternativeCS {
            get {
                return altcs;
            }
        }
    
        protected internal virtual PdfObject GetSpotObject(PdfWriter writer) {
            PdfArray array = new PdfArray(PdfName.SEPARATION);
            array.Add(name);
            PdfFunction func = null;
            if (altcs is ExtendedColor) {
                int type = ((ExtendedColor)altcs).Type;
                switch (type) {
                    case ExtendedColor.TYPE_GRAY:
                        array.Add(PdfName.DEVICEGRAY);
                        func = PdfFunction.Type2(writer, new float[]{0, 1}, null, new float[]{0}, new float[]{((GrayColor)altcs).Gray}, 1);
                        break;
                    case ExtendedColor.TYPE_CMYK:
                        array.Add(PdfName.DEVICECMYK);
                        CMYKColor cmyk = (CMYKColor)altcs;
                        func = PdfFunction.Type2(writer, new float[]{0, 1}, null, new float[]{0, 0, 0, 0},
                            new float[]{cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black}, 1);
                        break;
                    default:
                        throw new Exception(MessageLocalization.GetComposedMessage("only.rgb.gray.and.cmyk.are.supported.as.alternative.color.spaces"));
                }
            }
            else {
                array.Add(PdfName.DEVICERGB);
                func = PdfFunction.Type2(writer, new float[]{0, 1}, null, new float[]{1, 1, 1},
                    new float[]{(float)altcs.R / 255, (float)altcs.G / 255, (float)altcs.B / 255}, 1);
            }
            array.Add(func.Reference);
            return array;
        }
    }
}
